Daft User - FHB - I think I have one - Page 8

rik007 · 11th February 2012, 11:53

Thanks Harry for the info.

Curiously we had to make journey this morning, about 17miles each way. It was about -3degress outside, then it warmed to about zero degrees. Curiously on the way home the FBH turned off for a while at zero degrees. So I guess its not an exact science working out whe the FBH comes on and off, especially as you say the Engine temp from the diagnostics is useful, but not connected to the FBH.

So from what I have gathered there is the 'mushrrom' sensor for the +5degrees trigger and another within the FBH which detects the temp of the water, the internal FBH sensor must therefore override the 'mushroom' sensor.

Also .. my fault and a correction.... you can indeed hear the FBH pump running as mentioned when the car engine is also on. Although I couldnt hear it on the road, I got down beside the car when hime and listened at the rear wheel and could hear the pump clicking away.

..righ'o off to solder in the second resisitor...

Cheers again,

Rich.

.

Chezza · 11th February 2012, 12:48

Just got my connie with fbh but it doesn't work.
Found out why now though,seems the fuel pump is missing from the front of the offside rear wheel

.
Are these easy to find?

Unclefista · 11th February 2012, 12:55

They rust, badly enough to rust through and leak.
I wouldn't buy a used one.
New, they're £45 on Ebay, search for "Webasto diesel heater pump".

HTH

HarryM1BYT · 11th February 2012, 12:59

Quote:

Originally Posted by Chezza

Just got my connie with fbh but it doesn't work.
Found out why now though,seems the fuel pump is missing from the front of the offside rear wheel

.
Are these easy to find?

Very easy to find, very reliable, but they are in a very exposed location and the casings rust through quickly. Your chances of finding a used one on a 75 and worth buying are almost nil.

Chezza · 11th February 2012, 17:06

Thanks for info guys.
Before i found out that the pump was missing i tried to fire the fbh up.
The casing got warm,fan was working,rubber inlet sucked in the air.
tried 3 goes then went into lockdown mode. Might work if i fit a pump ehh.

HarryM1BYT · 11th February 2012, 17:24

Quote:

Originally Posted by Chezza

Thanks for info guys.
Before i found out that the pump was missing i tried to fire the fbh up.
The casing got warm,fan was working,rubber inlet sucked in the air.
tried 3 goes then went into lockdown mode. Might work if i fit a pump ehh.

If the engine was cold and the FBH case got warm, the only heat source is the glowpin. If the glowpin gets warm it is a good indication that the FBH PCB is in working order, so if fed with diesel from the pump, the likelihood is that it would work.

Chezza · 11th February 2012, 17:35

Harry thanks again.

Just found a couple of pumps on ebay,can't wait to get it going.

11th February 2012, 12:48	#72
Chezza Avid contributor 75 cdti se tourer Join Date: Sep 2011 Location: sheffield Posts: 137 Thanks: 0 Thanked 1 Time in 1 Post	Fbh Just got my connie with fbh but it doesn't work. Found out why now though,seems the fuel pump is missing from the front of the offside rear wheel. Are these easy to find?

11th February 2012, 12:55	#73
Unclefista Posted a thing or two Rover 75 CDT Join Date: Sep 2011 Location: Bradford Posts: 1,478 Thanks: 1 Thanked 14 Times in 8 Posts	They rust, badly enough to rust through and leak. I wouldn't buy a used one. New, they're £45 on Ebay, search for "Webasto diesel heater pump". HTH __________________ Love is like a snowmobile, speeding across the frozen tundra. Which suddenly flips, pinning you underneath. At night the ice-weasels come... http://farm6.staticflickr.com/5331/6...77671f80_n.jpg

11th February 2012, 17:06	#75
Chezza Avid contributor 75 cdti se tourer Join Date: Sep 2011 Location: sheffield Posts: 137 Thanks: 0 Thanked 1 Time in 1 Post	fbh Thanks for info guys. Before i found out that the pump was missing i tried to fire the fbh up. The casing got warm,fan was working,rubber inlet sucked in the air. tried 3 goes then went into lockdown mode. Might work if i fit a pump ehh.

11th February 2012, 17:35	#77
Chezza Avid contributor 75 cdti se tourer Join Date: Sep 2011 Location: sheffield Posts: 137 Thanks: 0 Thanked 1 Time in 1 Post	fbh Harry thanks again. Just found a couple of pumps on ebay,can't wait to get it going.

11th February 2012, 11:53	#71
rik007 Loves to post Rover 75 Tourer CDT 2002 Join Date: Aug 2011 Location: Cumbria Posts: 404 Thanks: 41 Thanked 7 Times in 7 Posts	Thanks Harry for the info. Curiously we had to make journey this morning, about 17miles each way. It was about -3degress outside, then it warmed to about zero degrees. Curiously on the way home the FBH turned off for a while at zero degrees. So I guess its not an exact science working out whe the FBH comes on and off, especially as you say the Engine temp from the diagnostics is useful, but not connected to the FBH. So from what I have gathered there is the 'mushrrom' sensor for the +5degrees trigger and another within the FBH which detects the temp of the water, the internal FBH sensor must therefore override the 'mushroom' sensor. Also .. my fault and a correction.... you can indeed hear the FBH pump running as mentioned when the car engine is also on. Although I couldnt hear it on the road, I got down beside the car when hime and listened at the rear wheel and could hear the pump clicking away. ..righ'o off to solder in the second resisitor... Cheers again, Rich. .